听一段学生和大学书店员工之间的对话。
Listen to a conversation between a student and an employee in the University bookstore.
联系客户活动是一个用户任务，因为书店员工不得不联系客户来解决信用卡问题。
The contact customer activity is a user task, because an employee of the book store has to get in contact with the customer to solve the bad credit card problem.
在悉尼，大约有一千五百名波特迷从市中心乘坐两辆蒸气火车，来到一个书店员工准备分发该书的秘密目的地。
In Sydney, about 1,500 Potter fans rode two steam trains from the city centre to a secret destination where bookstore staff were preparing to hand out copies of the book.
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